{"id":"CVE-2026-71253","aliases":["EUVD-2026-104193","GHSA-66gj-8qvf-qvfh"],"status":"published","title":"Apache Johnzon: ClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON","description":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON.\n\n\n\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\n\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.0038,"percentile":0.32301,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-470"],"published":"2026-10-19T10:36:41Z","modified":"2026-10-28T11:22:41Z","products":[{"vendor":"apache software foundation","product":"apache johnzon"}],"references":[{"url":"https://github.com/apache/johnzon/commit/dd3d00634c746a2173a2518e882e85e8a151bf30","tags":["patch","fix"]},{"url":"https://github.com/apache/johnzon/commit/91e7b0d21d08d138944e2570691939739422a3d6","tags":["patch","fix"]},{"url":"https://lists.apache.org/thread.html/3vgm1yo2sn9yhkvvs9lc4ro01vl3zt68","tags":["vendor-advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71253","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-66gj-8qvf-qvfh"},{"url":"https://repo.maven.apache.org/maven2","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71253.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-71253","title":"Apache Johnzon: ClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON","description":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON.\n\n\n\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\n\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.","status":"published","published":"2026-10-19T10:36:41.781Z","modified":"2026-10-20T19:34:25.835Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-470"],"updated_at":"2026-11-02T14:19:49.559463Z"}],"euvd":[{"id":"EUVD-2026-104193","description":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON.\n\n\n\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\n\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.","status":"published","published":"2026-10-19T10:36:41Z","modified":"2026-10-20T19:34:25Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:59:42.590373Z"}],"ghsa":[{"id":"GHSA-66gj-8qvf-qvfh","title":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability...","description":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON.\n\n\n\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\n\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.","status":"published","published":"2026-10-19T12:32:49Z","modified":"2026-10-20T21:31:48Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-470"],"updated_at":"2026-11-02T15:14:05.433073Z"}],"nvd":[{"id":"CVE-2026-71253","description":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON.\n\n\n\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\n\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.","status":"published","published":"2026-10-19T11:17:18.54Z","modified":"2026-10-20T20:17:24.763Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-470"],"updated_at":"2026-11-02T14:13:00.83844Z"}],"osv":[{"id":"CVE-2026-71253","title":"Apache Johnzon: ClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON","description":"Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Johnzon.\n\n\n\nClassConverter loads \u0026 static-initializes an attacker-named class from untrusted JSON.\n\n\n\n\nThis issue affects Apache Johnzon: from 1.0.0 before 2.2.0.\n\n\n\nUsers are recommended to upgrade to version 1.3.1 (javax namespace) or 2.2.0 (jakarta specification namespace), which fixes the issue.","status":"published","published":"2026-10-19T10:36:41.781Z","modified":"2026-10-28T11:22:41.513378816Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-470"],"updated_at":"2026-11-02T15:45:15.164658Z"}]}}